We report results of careful measurements of the work function versus coverage behavior of Cs on Nb(110) and Ba on Nb(110). Minimum work functions observed are 1.42 eV and 2.21 eV, respectively. We also report results of thermal desorption studies of the same two systems, where we find terminal desorption energies (near zero coverage) of 2.42 eV for Cs from Nb(110) and 3.72 eV for Ba from Nb(110). The onset of Ba desorption from monolayer coverage of Ba is observed at approximately 1000 K, whereas Cs is completely removed from the Nb(110) surface at this temperature.
Cesium and barium adsorption onto a clean niobium (110) surface
10th SymposiumùSpace Nuclear Power and Propulsion ; 1993 ; Albuquerque, NM, USA
AIP Conference Proceedings ; 271 , 3 ; 1633-1638
1993-01-20
6 pages
Conference paper
Electronic Resource
English
Adsorption of cesium on insulators
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